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Finding the Fourth Proportional to 394,909.30, 554,272.70 and 394,909.30

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Solution

The fourth proportional to 394,909.30, 554,272.70 and 394,909.30 is: 554,272.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,909.30 : 554,272.70 = 394,909.30 : x
  2. Step 2: Convert to fraction form
    394,909.30/554,272.70 = 394,909.30/x
  3. Step 3: Cross multiply
    394,909.30x = 554,272.70 × 394,909.30
  4. Step 4: Simplify right side
    394,909.30x = 218,887,443,966.11
  5. Step 5: Solve for x
    x = 218,887,443,966.11/394,909.30
  6. Step 6: Final answer
    x = 554,272.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.